---
product_id: 59392549
title: "Seachem Reef Kalkwasser, 2 kg"
brand: "seachem"
price: "1030 zł"
currency: PLN
in_stock: true
reviews_count: 5
url: https://www.desertcart.pl/products/59392549-seachem-reef-kalkwasser-2-kg
store_origin: PL
region: Poland
---

# Saturates 4 L water for precise dosing Raises calcium by 24 mg/L per gallon 2 kg ultra-pure calcium hydroxide Seachem Reef Kalkwasser, 2 kg

**Brand:** seachem
**Price:** 1030 zł
**Availability:** ✅ In Stock

## Summary

> 🌊 Elevate your reef’s vitality with precision and purity!

## Quick Answers

- **What is this?** Seachem Reef Kalkwasser, 2 kg by seachem
- **How much does it cost?** 1030 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/59392549-seachem-reef-kalkwasser-2-kg)

## Best For

- seachem enthusiasts

## Why This Product

- Trusted seachem brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Easy Integration:** Simple drip method keeps your reef chemistry balanced effortlessly
- • **Long-lasting Supply:** 2 kg bulk size supports consistent reef care without frequent repurchasing
- • **Pure & Safe Formula:** Ultra-pure powder ensures no harmful additives disrupt your ecosystem
- • **pH Stability Champion:** Raises pH to optimal 8.3–8.4 without altering carbonate alkalinity
- • **Precision Calcium Boost:** Easily increase tank calcium with exact dosing for thriving reefs

## Overview

Seachem Reef Kalkwasser is a premium 2 kg calcium hydroxide powder designed to safely and effectively increase calcium levels in aquarium top-off water. It raises pH to an ideal 8.3–8.4 without impacting carbonate alkalinity, ensuring stable reef conditions. The product dissolves easily for precise dosing, supporting healthy coral growth and vibrant marine ecosystems.

## Description

Product Description Seachem Reef Kalkwasser 2K Directions Never add this product directly to the tank. Add 3 g (1 teaspoon) to 4 L (1 US gallon) of water and mix to dissolve. If using pure water, a fully saturated solution is prepared by adding 6 g (2 teaspoons) to 4 L (1 US gallon). Drip this solution into tank. Monitor pH and carbonate alkalinity. Adjust rate of addition to maintain a stable pH (8.3–8.4). Notes: Adding 4 L (1 US gallon) of a saturated kalkwasser solution to 150 L (40 US gallons) will raise calcium by 24 mg/L. Always use the clear supernatant (top solution) only and do not allow undissolved material to enter the aquarium. Keep this container tightly closed when not in use and minimize solution/air contact to avoid calcium carbonate formation/precipitation. P.when('A').execute(function(A) { A.on('a:expander:toggle_description:toggle:collapse', function(data) { window.scroll(0, data.expander.$expander[0].offsetTop-100); }); }); Box Contains water treatment See more

## Features

- Very pure calcium hydroxide
- Ideal for increasing calcium in top-off water
- Increases pH with no impact on carbonate alkalinity

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Allergen Information | Yam Free |
| Asin | B0002A5WPG |
| Best Sellers Rank | 297,700 in Pet Supplies (See Top 100 in Pet Supplies) 2,314 in Aquarium Water Treatments |
| Brand Name | Seachem |
| Customer Reviews | 4.3 4.3 out of 5 stars (82) 4.3 out of 5 stars |
| Global Trade Identification Number | 00000116039901 |
| Item Form | Powder |
| Item Type Name | Aquarium Conditioner |
| Item Weight | 5.01 Pounds |
| Liquid Volume | 4 Litres |
| Manufacturer | Seachem |
| Manufacturer Part Number | 399 |
| Model Number | 399 |
| Number Of Items | 1 |
| Pet Type | Fish |
| Target Species | Fish |
| Unit Count | 2000.0 gram |
| Upc | 000116039901 |

## Product Details

- **Brand:** Seachem
- **Item form:** Powder
- **Item weight:** 5.01 Pounds
- **Liquid volume:** 4 Litres
- **Manufacturer:** Seachem

## Images

![Seachem Reef Kalkwasser, 2 kg - Image 1](https://m.media-amazon.com/images/I/61xyHTfQmFL.jpg)

## Customer Reviews

### ⭐ Broken box
*by  on Reviewed in the United Arab Emirates 20 August 2023*

Broken container. All power everywhere, I have to clean up

### ⭐⭐⭐⭐⭐ As described, cheap bulk pricing
*by  on Reviewed in Australia 19 August 2022*

Corals seem happy, this will last a while.

### ⭐⭐⭐⭐⭐ Great Kalk!
*by  on Reviewed in the United States 25 November 2025*

This stuff makes your reef rock! I always run this in my top off water. If your having trouble with your LPS, they love this stuff and grow like weeds when you run it.

## Frequently Bought Together

- Reef Kalkwasser, 2 kg / 4.4 lbs
- Instant Ocean Reef Crystals Reef Salt, Formulated Specifically For Reef Fish Tank Aquariums
- ESV B-Ionic Calcium Buffer System, 2-part Calcium and Alkalinity Maintenance Kit for Salt Water Coral Reef Aquarium, 2-Gallon

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---

*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-09-04*